Why subsidence claims can be rejected
Movement not considered subsidence
Cracking has many causes: thermal movement, shrinkage of new plaster, timber movement, settlement of a recent extension, or a lintel problem. If investigations point to one of these, the claim may fall outside the subsidence cover.
Pre-existing movement
Where evidence suggests the building moved before the policy started — historic distortion, previously filled cracks, old repairs — the insurer may say the damage is not new.
Drainage issues
Drainage findings cut both ways. A defective drain can be the accepted cause of movement, or it can be treated as a maintenance issue depending on the policy wording and the circumstances.
Poor workmanship
Inadequate foundations to an extension, a poorly formed structural opening or defective construction are commonly excluded as design or workmanship issues rather than subsidence.
Policy exclusions
Many policies exclude movement to paths, drives, patios, boundary walls and outbuildings unless the main building is damaged at the same time, and often apply a higher subsidence excess.
Insufficient evidence and disputes over causation
Sometimes monitoring is inconclusive, or the investigations carried out do not answer the question. The insurer may decline on the basis that the cause has not been established, which is a different position from saying subsidence did not occur.
What investigations might matter?
- Engineering evidence — a structural engineer’s report on the pattern, direction and likely mechanism of movement.
- Drainage surveys — CCTV footage and the accompanying report, including any recommended repairs.
- Monitoring — crack or level readings over time, and whether the period covered a full seasonal cycle.
- Site investigations where appropriate — trial pits, soil classification, moisture profiles and root identification.
You can ask the insurer for copies of the reports it relied upon. Reading them alongside an independent opinion is the usual way of testing whether the conclusion follows from the data.
What happens when a subsidence claim is not paid out?
If an insurer decides not to pay a subsidence claim, it should explain the reason for its decision and identify the policy wording, evidence or technical findings on which it has relied. A decision not to pay does not necessarily mean that the matter cannot be questioned, but the next step will depend on why the claim was rejected or restricted.
Understanding why the subsidence claim was declined
Start by obtaining the insurer’s decision in writing. Check whether it is saying that there is no subsidence, that the movement is not covered by the policy, that an exclusion applies, or that the damage is connected with another cause such as settlement, defective construction, drainage problems or poor workmanship.
Gathering evidence and challenging a subsidence decision
It may then be helpful to:
- ask for copies of the reports, photographs and evidence relied upon;
- compare the decision with the definitions and exclusions in the policy;
- identify the particular technical finding you disagree with;
- retain photographs, crack-monitoring information, drainage reports and correspondence;
- consider whether an independent structural engineer, drainage specialist, surveyor or other appropriate professional is needed;
- submit a formal complaint if you believe the decision is unsupported or the claim has not been handled fairly.
Making a complaint
A complaint should explain the specific part of the decision being challenged and provide evidence addressing that point. If the insurer issues a final response and the disagreement remains unresolved, an eligible policyholder may be able to refer the complaint to the Financial Ombudsman Service. Eligibility requirements and time limits apply, so the current position should be checked directly with the Ombudsman. Our guide to challenging a declined home insurance claim explains the complaint process in more detail.
Protecting evidence and safety
Repairs or investigations should not be undertaken simply to strengthen a claim without first considering whether they could disturb important evidence. Where movement may be continuing or the building may be unsafe, appropriate professional advice should be obtained.
Whether a subsidence claim should be paid will depend on the policy wording, the cause of the movement, the evidence and the individual circumstances. This section provides general UK information and is not advice on a particular insurance claim.
What if substantial repairs are still required?
Structural movement does not pause during a dispute, and unresolved causes such as a leaking drain can allow damage to progress. Where a property is affected, owners often need to consider protecting the building and addressing the underlying cause while the insurance position is resolved.
If the insurer has accepted part of the claim but the amount does not appear to cover the works, see home insurance settlement too low. For the general steps that follow a refusal, including the complaint process, see declined home insurance claims. Background on the investigation process is in our subsidence insurance claims guide.
Has Your Subsidence Claim Been Rejected?
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